HT instruments SIRIUS89N - Manual (Page 21)

SIRIUS89N
EN - 19
6.2. M Ω: INSULATION RESISTANCE MEASUREMENT WITH 50V, 100V, 250V,
500V, 1000V TEST VOLTAGE
The measurement comply with IEC 61557-2 and VDE 0413 part 1.
CAUTION
Before effecting the insulation test make sure that the circuit under test is
not energised and all the loads are disconnected.
Turn the
switch on M Ω position.
The key F1 permits to select one of the following measuring modes:
Mode " MAN" (Manual mode). Recommended test.
Mode " TMR" (Timer mode: test duration depends on the selected interval
from 10 to 999 seconds). This test can be executed when the test
required a defined duration.
6.2.1. Measurement Procedure
1. Select the desired mode by means of the
F1 key.
2. Connect the test leads to the instrument input terminals B1 and B4 respectively,
Example: insulation measurement between phase and
earth in an electrical installation using untied cables. Example: insulation measurement between
phase and earth in an electrical installation
using the shuko cable.
3. If the cables supplied with the instrument are not long enough for the measurement
you can extend the blue cable.
4. Connect the instrument terminals to the object which is to be submitted to the
insulation test after de-energizing the circuit under test and all the relative
loads (see previous picture).
5. By means of
F2 select the test voltage suitable for the type of test to be carried
out (see Table1). The values to be selected are:
• 50V (test on telecommunication systems)
• 100V
• 250V
• 500V
• 1000V